Crown-sheet protector for steam-boilers



(No Model.)

J. E. KRUMM.

GROWN SHEET PROTEGTOR FOR STEAM BOILERS. No. 261,730. Patented July 25, 1882.

N. PETERS. P holo-Limognpher. Wnhinglun. a. c.

UNITED STATES PATENT OFFICE.

- JOHN E. KRUMM, OF TURBOTVILLE, PEN NSYLVANIAI CROWN-SHEET PROTECTOR FOR STEAM-BOILERS.

SPECIFICATION formingpart of Letters Patent No. 261,730, dated July 25, 1882. Application filed November 23, 1881, (No model.)

To all whom it may concern:

Be it known that 1, JOHN E. KRUMM, acitizen of the United States, residing at Turbotville, in the county of Northumberland and State of Pennsylvania, have invented certain new and useful Improvementsin Grown-Sheet Protectors for Steam-Boilers, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to improvements in devices for protecting the crown-sheet of fireboxes in steam-boilers; andit consists in the combination of a water-tank placed above and around the crown-sheet, having suitable partitions provided with valves and a partition in the cylindrical part of the boiler provided with a valve, with an ordinary form of steam-boiler, the object being to protect the crown-sheet from excessive heat of the fire by keeping the water over and around the same when the boiler is in an inclinedposition, as Will be hereinafter more fully described.

In the annexed drawings, Figure 1 is a vertieallongitudinal section of alocomotive steamboiler with my improvement applied thereto. Fig. 2 is a transverse section of the same on line :20 a: of Fig. 1, and Fig. 3 a similar section on line 3! 3 v A represents the boiler, provided with the usual tubes, B, and fire-box O.

D is a water tank, cap, or box resting on top of the fire-box O-that is, immediately on the crownsheet-and it extends the whole width of the boiler and down the sides of the fire-box, asshown, a greater or less distance, as found convenient. This tank D may be nearly closed at the top, or entirely so, as shown in the drawings, and. has perforations a a in its top for the escape'of steam. One or more vertical partitions, 12, extend entirely across said tank 1) and divide it into two or more compartments, as shown. The front end of the tank is attached to the flue-sheet, as shown in Fig. 1.

c is a transverse vertical partition or plate extending entirely across the boiler in its cylindrical portion at about one-fourth the distance (more or less) from the fire-box. The

tubes B pass through holes in this plate. The partitions 1), front wall of tank, as well as tops, provided with flap-valves 0, arranged so as to open and let the water passthrough when the front or flue end of the boiler is raised higher than the fire-box end, and close and hold the water back in the compartments in the tank when the front end becomes lower than the fire-box end. These valves care connected by a chain or rod,f. To the valve in the partition 0 is suspended a weight, g. When the boiler A is on a perfect level the valves 0 willnot be quite closed, water being in the compartments of the tank and around the tubes B, the steam formed therefrom passing out through the apertures a a in the top of the tank. A valve-rod, h, extends from thepartition b nearest the rear end of the boiler through the same, by the use of which the operator can open and hold open the valves 0 at will. The valves all work automatically, and the red It, chain f, and Weight 9 may be dispensed with, if desired; but the instant the front end drops lower than the rear end the weight and the valves with it will move forward, and all will be closed, assisted by the pressure of the water. Said weight g is to be of such heft as experience may show to be proper, and is not calculated to control the action of the valves, which, like that of the weight itself, is automatic, but to render their action more positive.

My invention is more especially designed for locomotive-boilers; but it may be applied to other forms of boilers, if desired.

As before stated, when thelocomotive is go ing downgrade the valves close and confine the water in the tank around the crown-sheet, and also inv the compartment formed by the plate 0 and the firebox, thus protecting the crown-sheet and the portion of tubes nearest the fire from excessive heat.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A device for protecting the crown-sheet of a boiler, consisting of a water tank or box, D, having partitions b, said partitions having openings d and valves e, connected bya chain or rod, f, weight g, valve-rod h, and apertures f, valve-rod It, and partition 0, having opening a a, for escape of steam, placed on top of the d and valve 6, provided with a weight, g, and fire-box and extending a suitable distance chain f, substantially as shown, and for the down the sides of the same, substantially as purposes described.

5 shown and described. In testimony whereof I affix my signature in 15 2. In a steam-boiler, the fire-box O and tubes presence of two witnesses. B, in combination with a water-tank, D, hav- JOHN E. KRUMM. ing apertures a a in its top, partitions 1), ex- Witnesses:

tending slightly above the water-line, and hav D. W; DENNIS,

:0 ing openings 01 and valves 0, connected by chain WM. F. DERR. 

